RNA-3'-phosphate cyclase

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Template:Infobox enzyme In enzymology, a RNA-3′-phosphate cyclase (Template:EnzExplorer) is an enzyme that catalyzes the chemical reaction

ATP + RNA 3'-terminal-phosphate AMP + diphosphate + RNA terminal-2',3'-cyclic-phosphate

Thus, the two substrates of this enzyme are ATP and RNA 3'-terminal-phosphate, whereas its 3 products are AMP, diphosphate, and RNA terminal-2',3'-cyclic-phosphate.

This enzyme belongs to the family of ligases, specifically those forming phosphoric-ester bonds. The systematic name of this enzyme class is RNA-3'-phosphate:RNA ligase (cyclizing, AMP-forming). This enzyme is also called RNA cyclase.

Structural studies

As of 2010, three structures have been solved for this class of enzymes, with PDB accession codes Template:PDB2 and Template:PDB2, (un-adenylated)[1] and Template:PDB2 (adenylated).[2]

References

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Further reading

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